"Applications of intrinsic metrics to spectral problems on graphs" March 29, 2013: Analysis and Dynamics Seminar of the University of Denver.

"Graphs of unbounded geometry and intrinsic metrics" March 1, 2013: Analysis and Probability Seminar, University of Connecticut.

"Intrinsic metrics on weighted graphs" November 27, 2012: Differential Geometry Seminar, Graduate Center of the City University of New York.

"Intrinsic metrics on weighted graphs" October 23, 2012: Research Seminar, Department of Mathematics and Computer Science, Bronx Community College.

"Uniqueness of self-adjoint extensions of graph Laplacians" August 16, 2012: Seminar on Analysis, Geometry and Stochastics, Friedrich Schiller University of Jena, Germany.

"Heat kernels on graphs: symmetry and stochastic completeness" February 16, 2012: Probability Seminar, Department of Mathematics, University of Colorado Boulder.

"Symmetry, heat kernels, and spectrum of infinite weighted graphs" July 12, 2011: Research Seminar in Analysis, Friedrich Schiller University of Jena, Germany.

"Symmetry, heat kernels, and spectrum of infinite weighted graphs" July 5, 2011: Seminar of the Group of Mathematical Physics, Institute for Interdisciplinary Investigation of the University of Lisbon, Portugal.